mathsteps/test/factor/ConstantFactors.test.js

Step by step math solutions

const ConstantFactors = require('../../lib/factor/ConstantFactors');

const TestUtil = require('../TestUtil');

function testPrimeFactors(input, output) {
  TestUtil.testFunctionOutput(ConstantFactors.getPrimeFactors, input, output);
}

describe('prime factors', function() {
  const tests = [
    [1, [1]],
    [-1, [-1, 1]],
    [-2, [-1, 2]],
    [5, [5]],
    [12, [2, 2, 3]],
    [15, [3, 5]],
    [36, [2, 2, 3, 3]],
    [49, [7, 7]],
    [1260, [2, 2, 3, 3, 5, 7]],
    [13195, [5, 7, 13, 29]],
    [1234567891, [1234567891]]
  ];
  tests.forEach(t => testPrimeFactors(t[0], t[1]));
});

function testFactorPairs(input, output) {
  TestUtil.testFunctionOutput(ConstantFactors.getFactorPairs, input, output);
}

describe('factor pairs', function() {
  const tests = [
    [1, [[-1, -1], [1, 1]]],
    [5, [[-1, -5], [1, 5]]],
    [12, [[-3, -4], [-2, -6], [-1, -12], [1, 12], [2, 6], [3, 4]]],
    [-12, [[-3, 4], [-2, 6], [-1, 12], [1, -12], [2, -6], [3, -4]]],
    [15, [[-3, -5], [-1, -15], [1, 15], [3, 5]]],
    [36, [[-6, -6], [-4, -9], [-3, -12], [-2, -18], [-1, -36], [1, 36], [2, 18], [3, 12], [4, 9], [6, 6,]]],
    [49, [[-7, -7], [-1, -49], [1, 49], [7, 7]]],
    [1260, [[-35, -36], [-30, -42], [-28, -45], [-21, -60], [-20, -63], [-18, -70], [-15, -84], [-14, -90], [-12, -105], [-10, -126], [-9, -140],  [-7, -180], [-6, -210], [-5, -252], [-4, -315],  [-3, -420], [-2, -630], [-1, -1260], [1, 1260], [2, 630], [3, 420], [4, 315], [5, 252], [6, 210], [7, 180], [9, 140], [10, 126], [12, 105], [14, 90], [15, 84], [18, 70], [20, 63], [21, 60], [28, 45], [30, 42], [35, 36]]],
    [13195, [[-91, -145], [-65, -203], [-35, -377], [-29, -455], [-13, -1015], [-7, -1885], [-5, -2639],  [-1, -13195], [1, 13195], [5, 2639], [7, 1885], [13, 1015], [29, 455], [35, 377], [65, 203], [91, 145]]],
    [1234567891, [[-1, -1234567891], [1, 1234567891]]]
  ];
  tests.forEach(t => testFactorPairs(t[0], t[1]));
});